During chordate evolution,what is the sequence (from earliest to most recent)in which the following structures arose?
1)amniotic egg
2)paired fins
3)jaws
4)four-chambered heart

Question

Quizplus · Accepted Answer

The correct sequence reflecting chordate evolution starts with paired fins (indicative of early fish), followed by the development of jaws (an advancement in fish), then the amniotic egg (a key adaptation for life on land seen in reptiles and later vertebrates), and finally the four-chambered heart (seen in birds and mammals for efficient oxygenation of blood).

During Chordate Evolution,what Is the Sequence (From Earliest to Most